28e2075280
trunk/talk git-svn-id: http://webrtc.googlecode.com/svn/trunk@4318 4adac7df-926f-26a2-2b94-8c16560cd09d
114 lines
4.3 KiB
C++
114 lines
4.3 KiB
C++
/*
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* libjingle
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* Copyright 2004--2005, Google Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
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* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef TALK_BASE_PROXYSERVER_H_
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#define TALK_BASE_PROXYSERVER_H_
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#include <list>
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#include "talk/base/asyncsocket.h"
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#include "talk/base/socketadapters.h"
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#include "talk/base/socketaddress.h"
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#include "talk/base/stream.h"
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namespace talk_base {
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class SocketFactory;
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// ProxyServer is a base class that allows for easy construction of proxy
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// servers. With its helper class ProxyBinding, it contains all the necessary
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// logic for receiving and bridging connections. The specific client-server
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// proxy protocol is implemented by an instance of the AsyncProxyServerSocket
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// class; children of ProxyServer implement WrapSocket appropriately to return
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// the correct protocol handler.
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class ProxyBinding : public sigslot::has_slots<> {
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public:
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ProxyBinding(AsyncProxyServerSocket* in_socket, AsyncSocket* out_socket);
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sigslot::signal1<ProxyBinding*> SignalDestroyed;
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private:
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void OnConnectRequest(AsyncProxyServerSocket* socket,
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const SocketAddress& addr);
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void OnInternalRead(AsyncSocket* socket);
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void OnInternalWrite(AsyncSocket* socket);
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void OnInternalClose(AsyncSocket* socket, int err);
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void OnExternalConnect(AsyncSocket* socket);
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void OnExternalRead(AsyncSocket* socket);
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void OnExternalWrite(AsyncSocket* socket);
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void OnExternalClose(AsyncSocket* socket, int err);
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static void Read(AsyncSocket* socket, FifoBuffer* buffer);
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static void Write(AsyncSocket* socket, FifoBuffer* buffer);
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void Destroy();
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static const int kBufferSize = 4096;
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scoped_ptr<AsyncProxyServerSocket> int_socket_;
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scoped_ptr<AsyncSocket> ext_socket_;
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bool connected_;
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FifoBuffer out_buffer_;
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FifoBuffer in_buffer_;
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DISALLOW_EVIL_CONSTRUCTORS(ProxyBinding);
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};
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class ProxyServer : public sigslot::has_slots<> {
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public:
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ProxyServer(SocketFactory* int_factory, const SocketAddress& int_addr,
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SocketFactory* ext_factory, const SocketAddress& ext_ip);
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virtual ~ProxyServer();
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protected:
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void OnAcceptEvent(AsyncSocket* socket);
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virtual AsyncProxyServerSocket* WrapSocket(AsyncSocket* socket) = 0;
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void OnBindingDestroyed(ProxyBinding* binding);
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private:
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typedef std::list<ProxyBinding*> BindingList;
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SocketFactory* ext_factory_;
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SocketAddress ext_ip_;
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scoped_ptr<AsyncSocket> server_socket_;
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BindingList bindings_;
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DISALLOW_EVIL_CONSTRUCTORS(ProxyServer);
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};
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// SocksProxyServer is a simple extension of ProxyServer to implement SOCKS.
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class SocksProxyServer : public ProxyServer {
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public:
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SocksProxyServer(SocketFactory* int_factory, const SocketAddress& int_addr,
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SocketFactory* ext_factory, const SocketAddress& ext_ip)
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: ProxyServer(int_factory, int_addr, ext_factory, ext_ip) {
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}
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protected:
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AsyncProxyServerSocket* WrapSocket(AsyncSocket* socket) {
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return new AsyncSocksProxyServerSocket(socket);
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}
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DISALLOW_EVIL_CONSTRUCTORS(SocksProxyServer);
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};
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} // namespace talk_base
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#endif // TALK_BASE_PROXYSERVER_H_
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